CN209894970U - Miniaturized range finding subassembly - Google Patents
Miniaturized range finding subassembly Download PDFInfo
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- CN209894970U CN209894970U CN201920474541.6U CN201920474541U CN209894970U CN 209894970 U CN209894970 U CN 209894970U CN 201920474541 U CN201920474541 U CN 201920474541U CN 209894970 U CN209894970 U CN 209894970U
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Abstract
The utility model provides a miniaturized range finding subassembly, including the LTCC base plate, the welding is at positive radio frequency front end subassembly and antenna module of LTCC base plate, the antenna module includes 3db electric bridge, transmission antenna group and receiving antenna group, transmission antenna group comprises a pair of transmission resonance piece, receiving antenna group comprises a pair of receipt resonance piece, all connect through the gold ribbon between the transmission resonance piece and between the receipt resonance piece, be provided with first feed point on the gold ribbon between the transmission resonance piece, be provided with the second feed point on the gold ribbon between the receipt resonance piece, two pins that are close to radio frequency front end subassembly of 3db electric bridge respectively with power generator, the low noise amplifier passes through the gold ribbon and is connected, two pins of keeping away from radio frequency front end subassembly of 3db electric bridge are connected respectively in first feed point and second feed point. This technical scheme's range finding subassembly not only has miniaturized characteristics and can also realize the isolation problem of the signal receiving and dispatching of range finding subassembly.
Description
Technical Field
The utility model relates to a range finding technical field especially relates to a miniaturized range finding subassembly.
Background
In low power ultra-wideband radio ranging devices, it is generally required that the antenna can transmit and receive radio signals simultaneously. The radio signal received by the receiving antenna group comprises self-interference signals transmitted by the receiving antenna group and far target reflection signals. The strength of the signal transmitted by the antenna is usually much greater than that of the reflected signal, which may burn down electronic circuits such as a low noise amplifier of the receiver, so that it is necessary to reduce the amount of the signal transmitted by the antenna received by the receiving antenna as much as possible
Meanwhile, in the existing distance measurement and communication system and consumer electronics products, along with the diversity of product functions and the requirement of multi-band compatibility of products of consumers, the existing electronic products are more and more complex, and the arranged electronic components, modules and connecting wires are more and more dense, so that the system design is more and more bloated, the reliability is reduced, and the repair cost is increased. In the development direction of modern electronic products with increasing emphasis on miniaturization, multifunctionality and high reliability, an integrated interconnection solution is urgently found in a limited space, all functional modules in the electronic products are interconnected in a high-reliability mode as far as possible, and meanwhile, the problem of small size and the problem of cost are solved.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a miniaturized range finding subassembly aims at solving among the prior art low and the low problem of receiving and dispatching isolation degree of the integrated level of range finding subassembly.
In order to achieve the above object, the present invention provides a miniaturized ranging module, which comprises an LTCC substrate, a radio frequency front end module and an antenna module welded on the front side of the LTCC substrate, and a gold ribbon printed on the LTCC substrate;
the radio frequency front end component comprises a signal transmitting component and a signal receiving component, the signal transmitting component comprises a signal generator, a low-pass filter, a power divider and a power generator which are sequentially connected through a gold band, the signal receiving component comprises a low-noise amplifier, a frequency mixer, an intermediate frequency filter, a microcontroller and a signal amplifier, one end of the signal amplifier is connected with the frequency mixer through the gold band, and the other end of the signal amplifier is connected with the power divider through the gold band;
the antenna assembly comprises a 3db electric bridge, a transmitting antenna group and a receiving antenna group, wherein the transmitting antenna group consists of a pair of transmitting resonance plates, the receiving antenna group consists of a pair of receiving resonance plates 6, the transmitting resonance plates and the receiving resonance plates 6 are connected through gold ribbons, a first feed point is arranged on the gold ribbon between the transmitting resonance plates, a second feed point is arranged on the gold ribbon between the receiving resonance plates 6, two pins of the 3db electric bridge, which are close to the radio frequency front end component, are respectively connected with the power generator and the low noise amplifier through gold wire bonding, and two pins of the 3db electric bridge, which are far away from the radio frequency front end component, are respectively connected with the first feed point and the second feed point.
Preferably, the transmitting resonant chips and the receiving resonant chips are adjacently arranged and arranged in a circumferential array, the gold bands between the receiving resonant chips or between the transmitting resonant chips are disconnected in the middle, and gold wires are used for connection at the disconnected positions.
Preferably, the signal generator is a chirped continuous wave signal generator.
Preferably, the bottom the LTCC base plate corresponds radio frequency front end subassembly welding has the power conversion module, be close to on the LTCC base plate each component of radio frequency front end subassembly all corresponds and is provided with the through-hole, the filling has the metal to form the conductor passageway in the through-hole, each component of radio frequency front end subassembly with correspond the top of conductor passageway is passed through the gold thread bonding and is connected, the power conversion module has a plurality of voltage output pins, voltage output pin and corresponding the bottom of conductor passageway is passed through the gold thread bonding and is connected.
Preferably, the LTCC substrate further comprises a baseband module, the baseband module is welded on the bottom layer, and is arranged corresponding to the power conversion module, the power conversion module comprises a voltage input pin, and the voltage input pin is connected with a voltage output pin of the baseband module.
Preferably, the number of layers of the LTCC substrate is 1, and the power conversion module and the baseband module are disposed on opposite sides of the LTCC substrate.
Preferably, the number of layers of the LTCC substrate is multiple, a first cavity and a second cavity are formed in the LTCC substrate of the bottom layer, the power conversion module is arranged in the first cavity, the baseband module is arranged in the second cavity, the power conversion module comprises a voltage input pin, the voltage input pin is connected with a voltage output pin of the baseband module, and the through hole penetrates through the LTCC substrate except the bottom layer.
The utility model discloses integrate radio frequency front end subassembly and antenna module on the LTCC base plate, and weld on the LTCC base plate before the subassembly of each in the radio frequency front end subassembly to realize the signal transmission between each component through the gold tape of printing, simultaneously, the antenna module includes 3db electric bridge, transmitting antenna group and receiving antenna group, can realize the signal isolation between transmitting antenna group and the receiving antenna group through setting up of 3db electric bridge, prevent the interference between received signal and the transmitted signal. This technical scheme's range finding subassembly not only has miniaturized characteristics and can also realize the isolation problem of the signal receiving and dispatching of range finding subassembly.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic front view of a distance measuring assembly according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
fig. 3 is a schematic view of the reverse side of the distance measuring assembly in the embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | LTCC substrate | 9 | Frequency mixer |
| 1 | Signal generator | 10 | Intermediate frequency filter |
| 2 | Low-pass filter | 11 | Micro-controller |
| 3 | |
12 | Power supply conversion module |
| 4 | |
13 | Baseband module |
| 5 | Emission resonance sheet | 14 | 3db electric bridge |
| 6 | |
15 | Gold thread |
| 7 | Low noise amplifier | 16 | Gold belt |
| 8 | |
17 | Through hole |
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
The utility model aims at providing a miniaturized range finding subassembly aims at solving among the prior art low and the low problem of receiving and dispatching isolation degree of the integrated level of range finding subassembly.
Referring to fig. 1, an embodiment of the present invention provides a miniaturized distance measuring module, which includes an LTCC substrate 100, a radio frequency front end module and an antenna module welded on a front surface of the LTCC substrate 100, and a gold ribbon 16 printed on the LTCC substrate 100. Gold strip 16 refers to a strip circuit printed with the material gold.
The radio frequency front end component comprises a signal transmitting component and a signal receiving component, the signal transmitting component comprises a signal generator 1, a low-pass filter 2, a power divider 3 and a power generator 4 which are sequentially connected through a gold band 16, the signal receiving component comprises a low noise amplifier 7, a mixer 9, an intermediate frequency filter 10, a microcontroller 11 and a signal amplifier 17, one end of the signal amplifier is connected with the mixer 9 through the gold band 16, and the other end of the signal amplifier 17 is connected with the power divider 3 through the gold band 16.
The antenna assembly comprises a 3db electric bridge 14, a transmitting antenna group and a receiving antenna group, wherein the transmitting antenna group consists of a pair of transmitting resonance plates 5, the receiving antenna group consists of a pair of receiving resonance plates 6, the transmitting resonance plates 5 and the receiving resonance plates 6 are connected through gold ribbons 16, a first feeding point is arranged on the gold ribbon 16 between the transmitting resonance plates 5, a second feeding point is arranged on the gold ribbon 16 between the receiving resonance plates 6, two pins of the 3db electric bridge 14 close to a radio frequency front end component are respectively connected with a power generator 4 and a low noise amplifier 7 through the gold ribbons 16, and two pins of the 3db electric bridge 14 far away from the radio frequency front end component are respectively connected with the first feeding point and the second feeding point.
The low-pass filter 2 is used for suppressing higher harmonics and out-of-band signals of the transmission signals generated by the signal generator 1 and filtering useless signals; the power divider 3 is used for dividing the signal input by the low-pass filter 2 into a first path of transmitting signal and a second path of transmitting signal which are equal in size and consistent in phase; the power generator 4 is configured to perform power amplification on the first path of transmission signal, so that the power intensity meets a preset intensity; the antenna assembly is used for transmitting the first path of transmitting signals amplified by the power generator 4 to the space and receiving return signals; the low noise amplifier 7 is used for receiving the return signal received by the antenna group assembly and amplifying the return signal; the signal amplifier 17 is configured to receive the second path of transmission signal distributed by the power divider 3, and perform signal method processing on the second path of transmission signal; the frequency mixing module is used for mixing the second path of emission signals amplified by the signal method device and the return signals amplified by the low noise method device 7 to obtain frequency mixing signals; the intermediate frequency filter 10 is configured to filter out signals outside an intermediate frequency band in the mixing signals, so as to obtain intermediate frequency band signals; the microcontroller 11 is configured to perform analog-to-digital conversion on the intermediate frequency band signal and calculate a ranging result.
The signal generator 1 is preferably a chirp continuous wave signal generator 1, the transmission signal generated by the signal generator 1 being a chirp continuous wave signal.
Preferably, the transmitting resonant chip 5 and the receiving resonant chip 6 are adjacently arranged to form a circumferential array, so that the transmitting antenna set and the receiving antenna set form a complementary field pattern, and the size of the ranging module is further reduced. The gold strips 16 between the receiving resonant plates 6 or between the transmitting resonant plates 5 are disconnected in the middle, and are connected by gold wires 15 at the disconnected positions. And preferably the line connecting the midpoints of the two transmitting resonator plates 5 is perpendicular to the line connecting the midpoints of the two receiving resonator plates 6.
The 3db electric bridge 14 includes four pins, two pins close to the radio frequency front end component are pin number 1 and pin number 2, two pins far away from the radio frequency front end component are pin number 3 and pin number 4, pin number 1 is connected with the power generator 4 through the gold ribbon 16 for receiving the first path of transmission signal amplified by the power generator 4, pin number 2 is connected with the low noise amplifier 7 for transmitting the return signal to the low noise amplifier 7, pin number 3 is connected in the receiving antenna group, and pin number 4 is connected with the transmitting antenna group.
The isolation between pin 1 and pin 2 of the 3dB bridge 14 is high, typically 20dB, and the signal that is transmitted through pin 1 of the 3dB bridge 14 and leaks to pin 2 is attenuated by approximately 20 dB. In addition, when the No. 3 pin outputs the transmission signal, the signal of the reflected signal entering the No. 2 pin is also very small, and is approximately attenuated by about-15 dB. Therefore, the signal isolation of the signal pin 1 and pin 2 at the 3db bridge 14 is high.
When transmitting signals, after the transmitting signals are sent to the No. 1 pin of the 3dB electric bridge 14, signals with the phase difference of 90 degrees are formed at the No. 4 pin and the No. 3 pin, and respectively, a 0-degree phase signal attenuated to 3dB is formed at the No. 4 pin, and a 90-degree phase-shifting signal attenuated to 3dB is formed at the No. 3 pin. The two signals are respectively sent to the transmitting resonant chip 5 and the receiving resonant chip 6 through the gold band 16 and radiated to the space, and two mutually perpendicular electromagnetic fields with the phase difference of 90 degrees are synthesized in the space to just form a left-handed (right-handed) circularly polarized signal to be transmitted.
When receiving signals, right-handed (left-handed) circularly polarized return signals reflected back by obstacles are induced to equivalent circularly polarized signals by the transmitting antenna group and the transmitting antenna group when passing through the antenna assembly, and equivalent induced currents respectively enter the No. 4 pin and the No. 3 pin of the 3db electric bridge 14 after flowing out from the transmitting antenna group and the transmitting antenna group, and the phase difference of the two paths of induced signals is 90 degrees. The phase of the induction signal of the No. 4 pin after passing through the 3db electric bridge 14 is the same as that of the induction signal of the No. 3 pin after forming 90-degree phase change at the No. 2 pin, the phase of the induction signal of the No. 3 pin after passing through the 3db electric bridge 14 is unchanged at the No. 2 pin, therefore, the phases of the induction signals of the No. 3 pin and the No. 4 pin at the No. 2 pin after passing through the 3db electric bridge 14 are equal, and the two equal phase signals are synthesized to form a return signal. In addition, the phase of the induction signal of the No. 4 pin is unchanged at the No. 1 pin after passing through the 3db electric bridge 14, the phase of the induction signal of the No. 3 pin is 180 degrees at the No. 1 pin after passing through the 3db electric bridge 14, and two signals with the signal phase difference of 180 degrees are just counteracted with each other, so that a receiving signal cannot be formed at the No. 1 pin, the generation of the receiving signal at a signal transmitting pin during signal receiving is avoided, and the receiving and transmitting isolation is realized.
The LTCC substrate 100 may be a single layer or a plurality of layers. When the LTCC substrate 100 is a single layer, the radio frequency front end module and antenna assembly are soldered to the front side of the LTCC substrate 100,
the bottom LTCC substrate 100 is welded with a power conversion module 12 corresponding to the radio frequency front end assembly, each element on the LTCC substrate 100 close to the radio frequency front end assembly is correspondingly provided with a through hole 17 penetrating through the LTCC substrate 100, a metal material is filled in the through hole 17 to form a conductor channel, each element of the radio frequency front end assembly is connected with the top end of the corresponding conductor channel through gold wire bonding, the power conversion module 12 is provided with a plurality of voltage output pins, and the voltage output pins are connected with the bottom end of the corresponding conductor channel through gold wire bonding so as to realize that the power conversion module 12 supplies power for each element of the radio frequency front end assembly. The various components of the radio frequency front end components include a signal generator 1, a low pass filter 2, a power divider 3 and a power generator 4, a low noise amplifier 7, a mixer 9, an intermediate frequency filter 10, a microcontroller 11, and a signal amplifier 17.
The ranging assembly further comprises a baseband module 13, the baseband module 13 is welded to the bottom LTCC substrate 100 and is arranged corresponding to the power conversion module 12, the power conversion module 12 comprises a voltage input pin, and the voltage input pin is connected with a voltage output pin of the baseband module 13. The electric quantity of the ranging component comes from a power supply accessed from the outside by the baseband module 13, and then the power supply conversion module 12 obtains the voltage from the baseband module 13, performs certain voltage reduction processing, and outputs the voltage to each element of the radio frequency front end component.
The LTCC substrate 100 is at least one layer. When the LTCC substrate 100 is a single layer, the power conversion module 12 and the base band module 13 are soldered to the opposite surface of the LTCC substrate 100. When LTCC base plate 100 is the multilayer, be provided with first cavity and second cavity on the LTCC base plate 100 of bottom, power conversion module 12 set up in the first cavity, baseband module 13 sets up in the second cavity, power conversion module 12 includes voltage input pin, power conversion module 12's voltage input pin with baseband module 13's voltage output pin is connected, the through-hole 17 runs through simultaneously except that the bottom LTCC base plate 100.
The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.
Claims (7)
1. A miniaturized ranging module comprises an LTCC substrate, a radio frequency front end module and an antenna module which are welded on the front surface of the LTCC substrate, and a gold belt printed on the LTCC substrate;
the radio frequency front end component comprises a signal transmitting component and a signal receiving component, the signal transmitting component comprises a signal generator, a low-pass filter, a power divider and a power generator which are sequentially connected through a gold band, the signal receiving component comprises a low-noise amplifier, a frequency mixer, an intermediate frequency filter, a microcontroller and a signal amplifier, one end of the signal amplifier is connected with the frequency mixer through the gold band, and the other end of the signal amplifier is connected with the power divider through the gold band;
the antenna assembly comprises a 3db electric bridge, a transmitting antenna group and a receiving antenna group, wherein the transmitting antenna group consists of a pair of transmitting resonance plates, the receiving antenna group consists of a pair of receiving resonance plates, the transmitting resonance plates and the receiving resonance plates are connected through gold bands, a first feeding point is arranged on the gold band between the transmitting resonance plates, a second feeding point is arranged on the gold band between the receiving resonance plates, two pins of the 3db electric bridge, which are close to the radio frequency front end component, are respectively connected with the power generator and the low noise amplifier through the gold bands, and two pins of the 3db electric bridge, which are far away from the radio frequency front end component, are respectively connected with the first feeding point and the second feeding point.
2. The miniaturized ranging module of claim 1, wherein the transmitting resonator plates and the receiving resonator plates are adjacently arranged in a circumferential array, gold bands between the receiving resonator plates or between the transmitting resonator plates are disconnected in the middle, and gold wires are connected at the disconnected positions.
3. The miniaturized ranging module of claim 1, wherein the signal generator is a chirped continuous wave signal generator.
4. The miniaturized ranging module as claimed in one of claims 1 to 3, wherein a power conversion module is welded on the bottom LTCC substrate corresponding to the radio frequency front end module, a through hole is correspondingly formed on each element of the LTCC substrate close to the radio frequency front end module, a metal forming conductor channel is filled in the through hole, each element of the radio frequency front end module is connected with the top end of the corresponding conductor channel through gold wire bonding, the power conversion module is provided with a plurality of voltage output pins, and the voltage output pins are connected with the bottom end of the corresponding conductor channel through gold wire bonding.
5. The miniaturized ranging module as claimed in claim 4, further comprising a baseband module soldered to the bottom LTCC substrate and disposed corresponding to the power conversion module, wherein the power conversion module comprises a voltage input pin connected to a voltage output pin of the baseband module.
6. The miniaturized ranging module of claim 5, wherein the LTCC substrate has 1 layer, and the power conversion module and the baseband module are disposed on opposite sides of the LTCC substrate.
7. The miniaturized ranging module as claimed in claim 5, wherein the LTCC substrate has a plurality of layers, a first cavity and a second cavity are formed in the LTCC substrate, the power conversion module is disposed in the first cavity, the baseband module is disposed in the second cavity, the power conversion module includes a voltage input pin, the voltage input pin is connected to a voltage output pin of the baseband module, and the through hole penetrates through the LTCC substrate except for the bottom layer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920474541.6U CN209894970U (en) | 2019-04-09 | 2019-04-09 | Miniaturized range finding subassembly |
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| CN201920474541.6U CN209894970U (en) | 2019-04-09 | 2019-04-09 | Miniaturized range finding subassembly |
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| CN209894970U true CN209894970U (en) | 2020-01-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187205A (en) * | 2020-08-20 | 2021-01-05 | 电子科技大学 | Power division filter network with random phase difference output |
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2019
- 2019-04-09 CN CN201920474541.6U patent/CN209894970U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112187205A (en) * | 2020-08-20 | 2021-01-05 | 电子科技大学 | Power division filter network with random phase difference output |
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